Improvement in shutter-worker



sala gaatY e itin. g uw SEWELL n. JEWETT, 0F HAVERHILL, MASSACHUSETTS, ASSIGNOR To HIMSELF AND OSGOOD G. BOYNTON, on SAME PLACE.

Letters Patent No. 89,150, dated .April 20, 1869.

To all persons to whom, these presents 'ma-y come:

Beit known that I, SEwnLL E. JEWETT, of Haverhill, in the county of Essex, and Stategof Massachusetts, have inventeda new and useful Mechanism for Operating and Fastening Window-Blinds or Shutters; and I do hereby declare the same to be fully described in the following specification, and represented 4in the accompanying drawings, of which- Figure l is a front elevation, and

Figure 2, a side view of a blind and window-flame with my-invention applied thereto.

Figure 3 is a vertical, and

Figure 4, a horizontal section, taken through th operative lever and parts connected therewith.

Figure 5 is a transverse section of the gravitat-ing blind-catch, the window-frame, and the lower portion of the blind.

0n February 11, 1868, Letters Patent ofthe United States of America, numbered 74,227, were granted to me for an improvement in mechanism for operating Window-blinds or shutters.

My present invention involves the principle of that improvement, but includes f an addition, by which the device, or bar and cam used in effecting the opening and closing of the blind or Shutter, may also be einployed to raise it, in order to nnlatch it, thelatching of the blind or shutter being effected by a self-operating, or gravitating catch.

In the drawings, the blind is shown at A, and the window-frame at B, they being hinged together, as exhibited at C D.

A lever, or slide-bar, E, (provided with a knob, a, at its inner end, and a slotted head, b, at 'its outer extremity,) extends through one lof the upright bars'of the window-frame, or a tapering passage, c, made therein.

At the opposite ends ofthe passage, two cscutcheonplates, d e, are affixed to the frame.

The lever, or bar E goes through slots fg, made in these plates, the rearmost slot being considerably longer than the foremost one.

Against the inner side of the plate cl, and so as to serve as a cover to itsslot, is a plate, h, through which the bar E goes. The said plate It moves up vertically with, and will be so moved by the bar E, when used as a lever, and serves as a wind cnt-off, or as a means of preventing a draught, or current of air from entering the room through the slots j' and g. lThe slotted head b of the rod E, having the form, and being slotted in manner as represented in the drawings, receives a vertical pin, t', which extends through it, and two arms, or bracket-s, It It', projected from the blind, in manner as shown in figs. 1 and 2.

The bar E rests'on the'lower edge of the slot ofthe foremost escutcheon-plate, which serves as a fulcruln to enable the bar, when moved downward by the hand of a person, applied to its k'nob, to force the blind upward, so as to unlatch it, whether the blind be either entirely opened orclosed.

Instead of using a common spring duplex-catch, suchvas is commonly employed to hold a blind, either closed or opened, I make use of arotary and gravitating catch. l

It consists of a socketed cylindrical weight, F, and a box, or bearing, G, for supporting it.

The gravitating catch F is constructed with a flange, or head, It, at its upper end, which is to support the catch on the top of the bearing, G.

There is a'cylindrical chamber, or recess, l, formed in the catch, so as to open out of its inferior end, and the lower part of the catch, around this recess, is bevelled, chamfercd, or tapered, as shown at m.

The bearing, G, consists simply of a plate, n, and a cylindrical tube, o, projecting from it, and opening through such plate. This bearing is applied and fastened to the lower partvof the blind, in order that the catch may operate with either of two studs or catches, p q, one of which should project from the window-sill s, and the other from the side of the' building to which the window-frame may belong, the whole being so as to enable the blind to fasten itself upon either of the catches p q.

The rotary gravitating catch is better than a springcatch, because, with the latter, the blind would have to be raised higher to effect its disengagement,'and

furthermore, with the gravitating catch, made as described, so as to be capable of being revolved in its bearing or socket, it will revolve more or less, from time to time, when in use, so as not to become worn in one place, the wear being distributed over the lentire circle of the bevel or chamfer of the catch.

Thus, the rotary gravitating catch, made as described, will be more durable, and less liable to getout of order, and will operate, in many respects, better than a common catch, made with two cams or inclines only, standing in opposite directions from the recess or notch.

In figs. 2 and 3, tdenotes a turn-button, or stop, which is arranged underneath the lever E, and turns on a screw, u, inserted in the window-frame.

By turning the stop tupward, so that the lever E may rest on the free end of the stop, when such lever is in position as shown iu iig. 3, the stop will serve as a means of supporting the lever, so as to prevent the blind from being raised by a person on the outside of the house, and for the purpose of unlatching the blind.

By means of the lever E, I not only raise the blind or shutter, so as to disengage or unlock it, but, by forcing the lever forward,- until the blind is half open, and next pulling it back, I can effect either the entire opening or closingof the blind.

l am aware of the patent of. Cheney Reed, dated August l, 1848, which is for an improvement in mechanism for operating blinds, and I make no claim to any mechanism, or combination of' parts described therein.

My gravitating .blind-catch has its part F made so that it can revolve horizontally, as well as play or rise and fall vertie.lly, and such part has a shoulder, to support it in its socket-piece G, which is fixed to the blind, all of which differs from any eateh shown inthe said patent.

I4urthermore,.the level' E does not turn on its axis, and has no reversible inclined plane applied to it, like that shown in such patent of Reed, as applied to thc end ofthe shaft which goes through the window-frame.

My lever simply slides lengthwise, in order to eiieot theopening or closing of the blind; and besides, the lever has the esonteheon-plate c as a fnlernm, and is applied to the window-frame in 0r by an opening, c, which will admit of' the lever E being moved up and down as a lever, thc lower edge of the hole in the plate e being the fnlerum. f v

The slotted head oftherleverloperates, with the pin fi, to ei'eet the horizontal n'iovement of the blind when the lever E is moved longitudinally.

I therefore, herein, make no claim to the bar E, its

slotted head I), andthe pin i, as arranged and applied to the blind and the window-frame, in manner and simply for the purpose'as set forth in my said patent but, in combination therewith, Y A

I claim the application of the bar E to the windowframe, so that while capableof being moved longitudinally, so as `to e'ect the opening 0r closing of the blind, such bar may be moved downward on afnlerum,

, and used as a level', to effect the elevation of the blind Witnesses:

JAMES H. DUNCAN. T. D. HoDGEs. 

